... bag)Delivery Detail:time of your requestSpecificationsUnbreakable casting grinding ball JC 1.Size: 17-130mm 2.Hardness:HRC55-65 ... 0.65; Si: 0.15-0.37Unbreakable casting grinding ball JC1.Size: 17-130mm2.Hardness:HRC55-65 3.Chemical ... Sell):Steel Ball,Grinding Ball,Forged Steel Ball,Casting Steel Ball,Flange,Grinding Media Ball,Forged Grinding Ball,Casting Grinding Ball,Forging Steel Ball,Steel Flange ...